Malicious PDF — malware analysis report

Static analysis result for SHA-256 537e26ddb43015ed…

MALICIOUS

PDF

80.4 KB Created: 2021-04-08 03:43:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: e1a0205c9935a311f1384a807a3f7fca SHA-1: 5d8edebe425670873715de62cf53f2924d1343f3 SHA-256: 537e26ddb43015ed55310c8791c5aac8e1c4bdf130e8e6ba067b50c5ae61eb19
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document exhibits characteristics of a link farm, with numerous external URLs embedded within its structure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or SEO manipulation. While no scripts were explicitly extracted, the presence of many external links suggests the document's primary purpose is to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://seumenha.ru/strik?utm_term=how+to+pair+2+jam+plus+speakers PDF link annotation
    • http://gikodarekegov.mywebcommunity.org/qumica_inorgnica_descriptiva_geoff_rayner_canham.pdfIn PDF document text
    • https://zujujoweb.weebly.com/uploads/1/3/5/2/135297083/b45470e2cc8b4b8.pdfIn PDF document text
    • http://ladiluvame.mypressonline.com/49158980736.pdfIn PDF document text
    • https://xakivemo.weebly.com/uploads/1/3/0/7/130739368/1602657.pdfIn PDF document text
    • https://suzeziji.weebly.com/uploads/1/3/0/7/130739492/sutewalazubi-fesade-ralulovejane.pdfIn PDF document text
    • http://joxezorov.mywebcommunity.org/48396373503.pdfIn PDF document text
    • https://semulojera.weebly.com/uploads/1/3/2/6/132695334/xipajimezidiv.pdfIn PDF document text
    • http://testertumentum.space/jvc_kw_xs68_bluetoothjwqdm.pdfIn PDF document text
    • http://bluebadge-support.com/creed_2_russian_translations7pih.pdfIn PDF document text
    • http://lotupojaxuvutix.mygamesonline.org/37785336435.pdfIn PDF document text
    • https://wunanowadile.weebly.com/uploads/1/3/4/6/134600652/sapukuvolezeluxino.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gumomexad.onlinewebshop.net/8343551408.pdfIn PDF document text
    • http://noratev.myartsonline.com/antiderivative_of_fxcosx_25.pdfIn PDF document text
    • https://882e4f53-a7e1-4d4a-89e8-a6e6d9f9b805.filesusr.com/ugd/9a13d2_818680df0694427da3ecbc67d05f654c.pdf?index=trueIn PDF document text
    • https://cb38ef3f-1f2c-4622-8962-dca261660167.filesusr.com/ugd/3ae201_b2090695b5f0498fabc3865cb9084744.pdf?index=trueIn PDF document text
    • https://20996a60-9695-4f45-8fdb-44bdc783da55.filesusr.com/ugd/c57cae_ee1aaa20d7c54fca9361a0fc6d76a137.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE8B 5292 bytes
SHA-256: ac272f5e2f05bc15b15c43458cda28450b460bd4f123a78137658b37440804b2
font_01_sfnt_off00010080.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10080 2364 bytes
SHA-256: 8434203c2e28228ff33397425ce395c9e8564b7271178b15240254358eeda6ee
font_02_sfnt_off00010ab2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AB2 11976 bytes
SHA-256: 4e69707c10170d7aebd677d91012223e2e133f2ef2b2be5f8f8887c9bcb0a475

Open this report in the interactive analyzer, or submit your own file for analysis.